X-Ray Moire Techniques For Measuring Strain

X-ray moire method provides for measurement of strains throughout relatively large regions and in locations invisible or inaccessible to measurement by other techniques. For example, used to measure strains between layers of material in rubber tires. Method exploits body of knowledge already developed for optical moire measurement of strains. Offers advantages over optical methods of measuring strains within depths of objects, in that x-ray imaging not restricted to optically transparent materials. Also offers advantages over strain-gauge method that gauge wires not needed and measurements not limited to discrete gauge points.